DescriptionThe LD1585C is a low drop voltage regulator able to provide up to 5 A of output current. Dropout is guaranteed at a maximum of 1.4 V at the maximum output current, decreasing at lower loads. The device has been improved to be utilized in low voltage applications where transient response and minimum input voltage are critical.The most important feature of the device consist in lower dropout voltage and very fast transient response. A 2.85 V output version is suitable for SCSI-2 active termination. Unlike PNP regulators, quiescent current, the LD1585C quiescent current flows into the load, so increase efficiency. Only a 10 F minimum capacitor is need for stability.The device is supplied in TO-220. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1 % at 25 C.TO-220Table 1.Device summaryPart numberOrder codeOutput voltageLD1585CXXLD1585CVADJwww.st.comContentsLD1585CXX 2/15 Contents1Diagram . . . . . . . . . . . . . . . . . . . . . . . Features Typical dropout 1.2 VFast transient responseThree terminal adjustableGuaranteed output current up to 5 AOutput tolerance 1 % at 25 C and 2 % in full temperature rangeInternal power and thermal limitWide operating temperature range0 C to 125 CPackage available: TO-220Pinout compatibility wiVREG DescriptionThe LD1585C is a low drop voltage regulator able to provide up to 5 A of output current. Dropout is guaranteed at a maximum of 1.4 V at the maximum output current, decreasing at lower loads. The device has been improved to be utilized in low voltage applications where transient response and minimum input voltage are critical.The most important feature of the device consist in lower dropout voltage and very fast transient response. A 2.85 V output version is suitable for SCSI-2 active termination. Unlike PNP regulators, quiescent current, the LD1585C quiescent current flows into the load, so increase efficiency. Only a 10 F minimum capacitor is need for stability.The device is specifications are available at: www.st.com. L